While the sight of legal papers being served to Apple by other large manufacturers such as Nokia and HTC for Cupertino's alleged infringement on their designs isn't much of a surprise to internet passersby, it's a wee bit more rare to find a smaller, less public company putting their dukes up to defend themselves against a perceived wrong.

Book reader programs for the iPhone have been around for quite a while now, and it's clear iBooks takes some of the better elements as inspiration. The creator of Delicious Library was actually a bit upset about how closely iBooks resembled his software's interface. But there might just be a giant waiting in the wings to upset Apple's cart -- Microsoft.